Publication

Giant Magneto-Impedance in multilayers of magnetic amorphous ribbons

Martinus Adela Maria Gijs, Farid Amalou
2002
Conference Papers

Abstract

We have patterned multilayers of amorphous magnetic foils of Metglas/sup /spl reg// 2714a (cobalt-based) and Cu foil into microstructures of different sizes. We have studied the GM effect in these structures, and we have characterized the behavior of the relative permeability as a function of frequency and magnetic field. We obtain GMI ratios [Z/sub max/-Z(B/sub sat/)]/Z(B/sub sat/) up to 800% and GMR ratios [R/sub max/-R(B/sub sat/)]/R(B/sub sat/) up to 2400% at frequencies of 100 kHz-10 MHz, with B/sub sat/ the magnetic field where impedance and resistance saturate (typically a few mT).

Official source

https://infoscience.epfl.ch/entities/publication/f8471320-fff3-4e64-8b03-1d27a8f8f901

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Martinus Adela Maria Gijs, Farid Amalou
2002
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/f8471320-fff3-4e64-8b03-1d27a8f8f901

About this result

Related concepts (32)

Amorphous metal

An amorphous metal (also known as metallic glass, glassy metal, or shiny metal) is a solid metallic material, usually an alloy, with disordered atomic-scale structure. Most metals are crystalline in their solid state, which means they have a highly ordered arrangement of atoms. Amorphous metals are non-crystalline, and have a glass-like structure. But unlike common glasses, such as window glass, which are typically electrical insulators, amorphous metals have good electrical conductivity and can show metallic luster.

Permeability (electromagnetism)

In electromagnetism, permeability is the measure of magnetization produced in a material in response to an applied magnetic field. Permeability is typically represented by the (italicized) Greek letter μ. It is the ratio of the magnetic induction to the magnetizing field as a function of the field in a material. The term was coined by William Thomson, 1st Baron Kelvin in 1872, and used alongside permittivity by Oliver Heaviside in 1885. The reciprocal of permeability is magnetic reluctivity.

Magnetic field

A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field. A permanent magnet's magnetic field pulls on ferromagnetic materials such as iron, and attracts or repels other magnets.

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Giant Magneto-Impedance in multilayers of magnetic amorphous ribbons

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